Tinker Card payments

by Samy (Kondasamy Jayaraman) · drawn with Colorfigures by April Zhu

Three small orders, Day 1. 3-D Secure: skipped.held €0.00 · charged €63.80 · Larkspur kept €0.00

Chapter 5 of 7

Prove it’s you

Payments are safe from retries now. But a padlock went to a thief who had only a stolen card number.

This chapter: How does a bank check it’s really the cardholder, and what does that cost?

About this chapter

You will learn

  • 3-D Secure asks the issuer to check
  • A challenge stops thieves and some customers
  • Asking only on risk

Words you’ll meet

3-D Secure
A check during online checkout where the customer’s bank confirms it is really them.
Strong customer authentication
The EU rule: prove it with two of something you know, have or are.
Challenge
The step where the customer has to prove it, such as typing a code from their phone.

Step 1 of 4

A thief buys a padlock with Noor’s stolen card number. Larkspur skips on small orders.

Predict what a would do.

What would a 3-D Secure challenge do to the thief using Noor’s card?